Magnetic attachment unit

ABSTRACT

A magnetic attachment mechanism and method is described. The magnetic attachment mechanism can be used to releasably attach at least two objects together in a preferred configuration without fasteners and without external intervention. The magnetic attachment mechanism can be used to releasably attach an accessory device to an electronic device. The accessory device can be used to augment the functionality of usefulness of the electronic device.

CROSS REFERENCES TO RELATED APPLICATIONS

This is a national stage application under 35 U.S.C. §371 and claimspriority under 35 U.S.C. §119(b) to co-pending PCT Application No.PCT/US2012/023025, filed Jan. 27, 2012, entitled “MAGNETIC ATTACHMENTUNIT” by Corbin et al., that claims priority to U.S. ProvisionalApplication No. 61/438,220 filed Jan. 31, 2011 and entitled “MAGNETICATTACHMENT UNIT AND METHODS OF USE” by Corbin et al., each of which areincorporated by reference in their entirety for all purposes.

FIELD OF THE DESCRIBED EMBODIMENTS

The described embodiments generally relate to portable electronicdevices. More particularly, the present embodiments describe releasableattachment techniques well suited for portable electronic devices.

DESCRIPTION OF THE RELATED ART

Recent advances in portable computing includes the introduction of handheld electronic devices and computing platforms along the lines of theiPad™ tablet manufactured by Apple Inc. of Cupertino, Calif. Thesehandheld computing devices can be configured such that a substantialportion of the electronic device takes the form of a display used forpresenting visual content leaving little available space for anattachment mechanism that can be used for attaching an accessory device.

Conventional attachment techniques generally rely upon mechanicalfasteners that typically require at least an externally accessibleattaching feature on the electronic device to mate with a correspondingattaching feature on the accessory device. The presence of the externalattaching feature can detract from the overall look and feel of thehandheld computing device as well as add unwanted weight and complexityas well as degrade the appearance of the hand held computing device.

Therefore a mechanism for releasably attaching together at least twoobjects is desired.

SUMMARY OF THE DESCRIBED EMBODIMENTS

This paper describes various embodiments that relate to a system,method, and apparatus for forming a cooperative system using magneticattachment.

A magnetic attachment unit for magnetically attaching together a firstobject having a first magnetic attachment system and a second objecthaving a second magnetic attachment system to form a cooperative systemis described. The magnetic attachment unit includes at least a magneticattachment system that is arranged to provide a first activation forcefor activating the first magnetic system and a second activation forcefor activating the second magnetic system. The activated first andsecond magnetic systems cooperate with the magnetic attachment system toreleasably secure the first object and the second object together toform the cooperating magnetic system.

A magnetic attachment unit for magnetically attaching together at leastindividual first electronic and second electronic devices each having anassociated magnetic attachment feature, the magnetically attachedelectronic devices communicating with each other to when magneticallyattached to form a cooperative electronic system. The magneticattachment unit includes a body having a first side and a second sideopposite the first side, a first magnetic attachment system at a firstside of the body comprising at least a first magnet arranged to providea first activation force for activating a corresponding magneticattachment feature in the first electronic device, and a second magneticattachment system at a second side of the body comprising at least asecond magnet arranged to provide a second activation force foractivating a corresponding magnetic attachment feature in the secondelectronic device, wherein a magnetic attachment force generated betweenthe activated first and second magnetic systems and the correspondingmagnets in the magnetic attachment unit results in the first and secondindividual electronic devices to operable together as a cooperatingelectronic device.

A cover assembly is described that includes at least a hinge assemblydetachably connected to a host unit and a cover assembly pivotallyattached to hinge assembly having a size and shape in accordance withthe host unit. The cover assembly includes at least a cover portionpivotally attached to the hinge portion at a first pivot, a flap portionseparate from the cover portion pivotally attached to the hinge portionat a second pivot different from the first pivot such that the coverportion and the flap portion rotate about their respective pivot pointsseparately in such that the cover forms a support structure thatsupports the host device at an inclined angle with respect to the flapportion.

A docking station includes at least a base portion arranged to providesupport for a host device, the base portion includes an attachment unit,the attachment unit arranged to detachably secure the host device andthe base portion, a user input portion, the user input portion arrangedto receive a user input event, and a communication port, thecommunication port arranged to provide a communication path between thehost device and the user input portion of the base portion, whereininformation associated with the user input event at the user inputportion is passed by way of the communication path provided by thecommunication port to the host device.

Other aspects and advantages of the invention will become apparent fromthe following detailed description taken in conjunction with theaccompanying drawings which illustrate, by way of example, theprinciples of the described embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be readily understood by the following detaileddescription in conjunction with the accompanying drawings, wherein likereference numerals designate like structural elements, and in which:

FIG. 1 is a simplified block diagram of an article and an electronicdevice that can be releasably attached to each other in a desired andrepeatable manner.

FIG. 2A is a simplified perspective view of an article that can bereleasably attached to an electronic device via a side magneticattachment system, in accordance with one described embodiment.

FIG. 2B shows the article and the electronic device of FIG. 2A attachedin accordance with the side magnetic attachment system.

FIG. 3A is a simplified perspective view of a first electronic devicethat can be releasably attached to a second electronic device via a sidemagnetic attachment system, in accordance with one described embodiment.

FIG. 3B shows the first electronic device and the second electronicdevice of FIG. 3A attached in accordance with the side magneticattachment system to form a cooperating electronic system.

FIGS. 4A and 4B are simplified perspective views of an article that canbe releasably attached to an electronic device via magnetic attachmentunit and corresponding magnetic system.

FIGS. 5A and 5B are simplified perspective views of an article in theform of electronic device that can be releasably attached to anelectronic device via magnetic attachment unit.

FIG. 6A shows a top perspective view of electronic device 100 inaccordance with the described embodiments.

FIG. 6B shows activated magnetic attachment feature.

FIGS. 7A-7B show magnetic attachment unit used to magnetically attachelectronic devices to form cooperating system.

FIGS. 8A-8C show various embodiments of magnetic attachment unit thatcan be used to magnetically attach electronic device to an object havinga suitably configured magnetic attachment system.

FIG. 9 illustrates an arrangement formed by magnetically attachingtablet device and tablet device by way of flexible magnetic attachmentunit in an open configuration.

FIG. 10 shows arrangement in a closed configuration in which a tabletdevice uses the flexible nature of flexible connecting member to foldatop one another.

FIGS. 11A and 11B show tablet devices magnetically attached to eachother by way of magnetic attachment unit.

FIGS. 12A-12C show tablet device connected together by way of magneticattachment unit.

FIG. 13 shows magnetic attachment unit magnetically attaching tabletdevices to form tablet array.

FIGS. 14A-14B show a cross section of system in accordance with anembodiment.

FIGS. 15-17 show various embodiments of flap portion of cover assembly.

FIGS. 18A-18D show fixed magnetic docking station in accordance with thedescribed embodiments.

FIGS. 19A-19B show pivoting magnetic docking station in accordance withthe described embodiments.

FIGS. 20A-20F show various hanging accessories in accordance with thedescribed embodiments.

FIGS. 21A and 21B show additional hanging accessories in accordance withthe described embodiments.

FIG. 22A shows a vehicle mount in accordance with the describedembodiments.

FIG. 22B shows a tread mill mount in accordance with the describedembodiments.

FIGS. 23A-23H show various accessories in accordance with the describedembodiments.

FIG. 24 shows a travel case in accordance with the describedembodiments.

FIG. 25A-25B show electromagnetic release mechanism.

FIGS. 26A-26C show a hands free approach to altering an operating stateof an electronic device.

FIGS. 27A-27B show hands free ejection embodiment.

FIGS. 28A-28B show a magnetic window embodiment.

FIGS. 29A-29B shows another embodiment of a magnetic attachment feature.

FIGS. 30A-30B show still another embodiment of the magnetic attachmentfeature of FIGS. 29A-29B.

FIGS. 31A-31C show the magnetic attachment feature of FIGS. 30A-30Barranged to provide magnetic attachment information.

FIG. 32A shows an embodiment of a representative magnetic element of themagnetic attachment feature of FIGS. 31A-31C providing a first typeinformation.

FIG. 32B shows an embodiment of the representative magnetic element ofthe magnetic attachment feature of FIGS. 31A-31C providing a second typeinformation.

FIG. 33 shows a table of representative attachment status according toinformation provided by the magnetic attachment feature of FIGS.31A-31B.

FIG. 34 is a block diagram of an arrangement of functional modulesutilized by a portable media device.

FIG. 35 is a block diagram of an electronic device suitable for use withthe described embodiments.

DETAILED DESCRIPTION OF SELECTED EMBODIMENTS

Reference will now be made in detail to representative embodimentsillustrated in the accompanying drawings. It should be understood thatthe following descriptions are not intended to limit the embodiments toone preferred embodiment. To the contrary, it is intended to coveralternatives, modifications, and equivalents as can be included withinthe spirit and scope of the described embodiments as defined by theappended claims.

The following description relates in general to a mechanism that can beused to attach together at least two suitably configured objects. In oneembodiment, this can be accomplished without the use of conventionalfasteners. Each of the objects can include an attachment featurearranged to provide a magnetic field having appropriate properties. Whenthe attachment features are brought into proximity with each other, themagnetic fields can cooperatively interact based upon their respectiveproperties and can result in the objects magnetically attaching to eachother in a desired and repeatable manner. For example, due at least inpart to the cooperative nature of the interaction of the magneticfields, the objects can attach to each other in a pre-determinedposition and relative orientation without external intervention. Forexample, the cooperative magnetic interaction can result in the objectsself-aligning and self-centering in a desired orientation.

The objects can remain in the magnetically attached state if and until areleasing force of sufficient magnitude is applied that overcomes theoverall net attractive magnetic force. In some cases, however, it can bedesirable to detach the objects serially (along the lines of a zipper)in which case, the releasing force only need be of sufficient magnitudeto overcome the net magnetic attractive force of one pair of magneticelements at a time. Connectors such as mechanical fasteners are notrequired to attach the objects together. Furthermore, to prevent undueinterference to the magnetic interaction between the magnetic attachmentfeatures, at least a portion of the objects in the vicinity of themagnetic attachment features can be formed of magnetically inactivematerials such as plastic or non-ferrous metals such as aluminum ornon-magnetic stainless steel.

The objects can take many forms and perform many functions. Whenmagnetically attached to each other, the objects can communicate andinteract with each other to form a cooperating system. The cooperatingsystem can perform operations and provide functions that cannot beprovided by the separate objects individually. In another embodiment, atleast one device can be used as an accessory device. The accessorydevice can be magnetically attached to at least one electronic device.The accessory device can provide services and functions that can be usedto enhance the operability of the electronic device(s). For example, theaccessory device can take the form of a protective case that can bemagnetically attached to the electronic device and enclose theelectronic device. The protective case can provide protection to certainaspects (such as a display) of the electronic device as well as to theelectronic device as a whole. The magnetic attachment mechanism used tomagnetically attach the protective case and the electronic device canassure that the protective case can only attach to the electronic devicein a specific orientation. Moreover, the magnetic attachment mechanismcan also assure proper alignment and positioning of the protective caseand the electronic device.

In one embodiment, a first object and a second object can bemagnetically attached to each other such that the first object can beconfigured to provide a support mechanism to the second object. Thesupport mechanism can be mechanical in nature. For example, the firstobject can take the form of a stand that can be used to support thesecond object on a working surface such as a table. In one embodiment,the stand can take the form of an articulating stand arranged to presentthe second object in a number of angles and orientations.

In one embodiment, the first object can take the form of a dock arrangedto magnetically attach to the second object in a particular manner. Thedock can be electronic in nature in those cases where the second objectis an electronic device. The dock can provide an electrical contact thatcan provide power from an external power supply to the electronicdevice. The electrical contact can also provide a mechanism by whichinformation can be provided to the electronic device and as well asinformation provided from the electronic device. For example, the dockcan include audio output devices such as speakers arranged to broadcastsound based upon an audio signal received from the electronic device.

In one embodiment, the first object can take the form of a hangingapparatus. As such, the first object can be used to hang the secondobject that can then be used as a display for presenting visual contentsuch as a visual, still images like a picture, art work, and so on. Thesupport mechanism can also be used as a handle for conveniently graspingor holding the second object. This arrangement can be particularlyuseful when the second object can present visual content such as images(still or visual), textual (as in an e-book) or has image capturecapabilities in which case the second object can be used as an imagecapture device such as a still or visual camera and the first object canbe configured to act as a support such as a tripod or handle. The handlecan be fixed or flexible. In one embodiment, the hanging apparatus cantake the form of hooks, suction cups, or any other appropriate hangingdevice. For example, the hanging apparatus can be used to secure theelectronic device to a whiteboard. In one embodiment, the hangingapparatus in the form of a hook can be used to secure the electronicdevice to a seat cushion in an automobile, plane, or train. In this way,the electronic device can provide visual content for those seated in aposition to view the display screen.

In one embodiment, the attachment can occur between a first and secondobject where the first object and second object are each electronicdevices. The electronic devices can be magnetically attached to eachother to form a cooperative electronic system in which the electronicdevices can communicate with each other. In one embodiment, the firstand second electronic devices can be attached to each other directly. Inone embodiment, a magnetic attachment unit can be used to magneticallyattach together the first and second electronic devices. Communicationbetween the first and second electronic devices can occur before,during, and after the magnetic attachment is complete.

As part of this communication, information can be passed between thefirst and second electronic devices. The information can be processed inwhole or in part at either the first or second electronic devicedepending upon the nature of the processing. In this way, thecooperative electronic system can take advantage of the synergisticeffect of having multiple electronic devices magnetically attached andin communication with each other. In one implementation, thecommunication can be carried out wirelessly using any suitable wirelesscommunication protocol such as Bluetooth (BT), GSM, CDMA, WiFi, and soon.

In one embodiment, the magnetic attachment unit can pass informationbetween the first and second electronic devices. In one embodiment,information can be provided from the magnetic attachment unit and passto one or both of the first and second electronic devices. For example,in one embodiment, the magnetic attachment unit can take the form of amagnetic binder that can be used to attach the first and secondelectronic devices in the form of an electronic book. As such, at leastone electronic device can have a display suitable for presented visualcontent. Information, such as book content, can pass from the magneticbinder to the electronic device. The information can cause theelectronic device to operate in a manner consistent with theinformation.

For example, when information provided to the first and or secondelectronic device is associated with a specific learning tutorial (suchas math, languages, etc.), the information can cause one or both of theelectronic devices to operate in a manner consistent with the tutorial,such as presenting lessons, work sheets, and so forth. For example, thefirst electronic device can present visual content consistent with thesubject matter of the tutorial while the second electronic device canfacilitate user interaction by presenting a user input such as a virtualkeyboard, touch input, and so on.

In one embodiment, the second electronic device can take the form of aperipheral device such as a keyboard, touch pad, joystick, and so forth.This embodiment can be well suited for video games presented by thefirst electronic device. In one embodiment, the magnetic attachment unitcan store the information required to initiate the video game whereas inanother embodiment, the magnetic attachment unit can act as a trigger.The trigger acting to initiate a game resident on either or both thefirst and second electronic devices.

In one embodiment, the cooperative electronic system can take the formof an array of electronic devices rigidly connected to each other by wayof the magnetic attachment unit. The magnetic attachment unit caninclude a plurality of magnetic attachment features. Each of theplurality of magnetic attachment features can magnetically interact witha corresponding magnetic attachment feature including in a correspondingelectronic device. In one embodiment, the array of electronic devicescan act as a single unified display (along the lines of a mosaic). Inanother embodiment, the array of electronic devices can provide a singleor a set of functions (such as virtual keyboard).

As an example, a first and second electronic device can be magneticallycoupled together by way of a magnetic attachment unit. The magneticattachment unit can include a magnetic system. In one embodiment, themagnetic attachment unit can act as a trigger to activate a magneticattachment system in each of the first and second electronic devices. Inone embodiment, the activating can be a result of a keyed magneticinteraction between the magnetic system and each of the magneticattachment systems. In one embodiment, the keyed magnetic interactioncan take the form of an interaction between magnetic fields havingproperties based upon an arrangement of magnetic elements in themagnetic system and the magnetic attachment systems in the first andsecond electronic devices.

In one embodiment, the magnetic attachment unit can be formed of abendable yet sturdy material. In this way, a portion of the magneticattachment unit magnetically attached to the first electronic device canbe bent in such a way that a display on the first electronic device ispresented to a user at a comfortable viewing angle of about 70°-75°while the second electronic device remains flat on a supporting surfacesuch as a table. In this way, the second electronic device can displayan input (such as a virtual keyboard, GUI, and so on) that can be usedto input data to the cooperative system. In one embodiment, the firstelectronic device can present visual content in accordance with thecurrent state of the cooperative system.

For example, the second electronic device can present a virtual keyboardthat can be used to provide input commands and/or data and such to thecooperative system by the magnetic attachment of the first and secondelectronic devices. In the case where the magnetic attachment unit isassociated with a math tutorial, for example, information provided tothe first and second electronic devices can cause a display of the firstelectronic device to present subject matter (math equations to solve,problems, etc.) for which the student can interact by using the virtualkeyboard presented by a display of the second electronic device.

These and other embodiments are discussed below with reference to FIGS.1-35. However, those skilled in the art will readily appreciate that thedetailed description given herein with respect to these figures is forexplanatory purposes only and should not be construed as limiting. Forthe remainder of this discussion, a first and second object eachsuitably configured to magnetically attach to each other in accordancewith the described embodiments will be described. It should be noted,however, that any number and type of suitably configured objects can bemagnetically attached to each other in a precise and repeatable manner.In particular, for simplicity and clarity, for the remainder of thisdiscussion, the first object is presumed to take the form of anelectronic device and in particular a handheld electronic device.

FIG. 1 is a simplified block diagram of article 10 and electronic device12 that can be releasably attached to each other in a desired andrepeatable manner. More specifically, article 10 and electronic device12 can attach to each other at a pre-determined position and relativeorientation without external intervention and without the use ofmechanical fasteners. Article 10 and electronic device 12 can remainattached to each other if and until a releasing force is applied thatovercomes the engagement between them. In some cases, however, it can bedesirable to detach article 10 and electronic device 12 serially (alongthe lines of a zipper) in which case, a releasing force can be appliedthat can undo the engagement between article 10 and electronic device 12about one attachment component at a time. For example, an attachmentcomponent can include a suitably matched pair of magnetic elements, onein article 10 and a second in electronic device 12.

Electronic device 12 can take many forms. For example, electronic device12 can take the form of a portable electronic device. In some examples,the portable electronic device can include housing 15. Housing 15 canenclose and provide support for components of the portable electronicdevice. Housing 15 can also provide support for at least a large andprominent display occupying a substantial portion of a front face of theportable electronic device. The display can be used to present visualcontent. The visual content can include still images, visual, textualdata, as well as graphical data that can include icons used as part of agraphical user interface, or GUI.

In some cases, at least a portion of the display can be touch sensitive.By touch sensitive it is meant that during a touch event, an object(such as a finger, stylus, and so on) can be placed in contact with orin proximity to an upper surface of the display. The particulars of thetouch event (location, pressure, duration, and so forth) can be used toprovide information to the portable electronic device for processing. Insome embodiments, in addition to or in place of information beingprovided to the portable electronic device, information can be providedby the portable electronic device in a tactile manner using, forexample, haptic actuators. It should be appreciated however that thisconfiguration is by way of example and not by way of limitation as theelectronic device can be widely varied. In one example, the portableelectronic device is a tablet computer such as, for example, the iPad™manufactured by Apple Inc. of Cupertino, Calif.

Article 10 can be widely varied and can take many forms such as, forexample, an accessory or accoutrement of electronic device 12. As anaccessory, article 10 can be configured as a cover, a stand, a dock, ahanger, an input/output device and so on. In a particularly useful form,article 10 can take the form of a protective cover that can include amember, such as a flap, that can be positioned over the display of theportable electronic device. Like the electronic device 12, the article10 can also include housing 17 that can enclose and provide support forcomponents of the article 10.

Either one or both of article 10 and electronic device 12 can includeattachment features. For example, article 10 can include attachmentsystem 13 and electronic device 12 can include corresponding attachmentsystem 14. Attachment system 13 can cooperate with correspondingattachment system 14 to attach article 10 and electronic device 12 in areleasable manner. When attached to each other, article 10 andelectronic device 12 can operate as a single operating unit. On theother hand, in the detached mode, article 10 and electronic device 12can act separately, and if desired, as two individual parts. Attachmentsystems 13 and 14 can be configured in such a way that article 10 andelectronic device 12 can attach to each other in a desired andrepeatable manner. In other words, attachment systems 13 and 14 canrepeatedly align article 10 and electronic device 12 together such thatthey are consistently in a pre-determined position relative to oneanother.

The attachment features can be widely varied. The attachment can beprovided by various types of couplings including mechanical, electrical,static, magnetic, frictional, and/or the like. In one embodiment, theattachment cannot be seen from the outside of the article and/orelectronic device. For example, the article and device can not includeexternal visible attachment features that adversely affect the look andfeel or ornamental appearance (e.g., snaps, latches, etc.), but ratherattachment features that cannot be seen from the outside of the articleor device and thus do not affect the look and feel or ornamentalappearance of the article or device. By way of example, the attachmentfeatures can be provided by attraction surfaces that do not disturb theexternal surfaces of the article or device. In one embodiment, at leasta portion of the attachment features utilize magnetic attraction toprovide some or all of the attaching force.

The attachment systems can include one or more attachment features. Ifmultiple features are used, the manner in which they secure can be thesame or different. For example, in one implementation, a firstattachment feature utilizes a first attachment means while a secondattachment feature utilizes a second attachment means that is differentthan the first attachment means. For example, the first attachment meanscan utilize a friction coupling while the second attachment means canutilize magnetism. In another implementation, a first attachment featureutilizes a first attachment means while a second attachment featureutilizes the same or similar attachment means. For example, the firstand second attachment means can be provided by magnets. Although, theattachment means can be similar it should be appreciated that theconfiguration of the features can be different depending on the needs ofthe system. Further, any number and configuration of attachment meanscan be used.

In the illustrated embodiment, the attachment systems 13 and 14 eachinclude at least a first set of corresponding attachment features 13a/14 a and a second set of corresponding attachment features 13 b/14 b.Attachment feature 13 a can cooperate with corresponding attachmentfeature 14 a to attach article 10 and electronic device in a releasablemanner. In one particular implementation this is accomplished withmagnetic attraction. Further, attachment feature 13 b can cooperate withcorresponding attachment feature 14 b to further attach article 10 andelectronic device in a releasable manner. In one particularimplementation this is accomplished with magnetic attraction. By way ofexample, attachment features 13 a/14 a can be provided at a firstlocation while attachment features 13 b/14 b can be provided at a secondlocation.

In a specific example, attachment feature 14 a can, in cooperation withattachment feature 13 a, secure electronic device 12 to article 10. Inanother example, attachment feature 13 b can secure article 10 to theelectronic device 12 using attachment feature 14 b. It should be notedthat the attachment systems 13 and 14 of this example can be separate orthey can cooperate together to produce the attachment. If theycooperate, attachment features 14 a and 14 b correspond to or mate withone or more attachment features 13 a and 13 b. In any case, theattachment features in any of these examples can be accomplished throughmechanical, static, suction, magnetic attachment and/or the like.

The placement of the attachment systems and the attachment featureswithin the attachment systems can be widely varied. Regarding electronicdevice 12, attachment system 14 can be placed on front, back, top,bottom, and/or sides. Attachment features 14 a and 14 b can be placedany location within attachment system 14. Accordingly, attachmentfeatures 14 a and 14 b can be placed anywhere relative to the housingand/or the display. In one example, the attachment features 14 a and 14b can provide engagement along one or more of the sides of the housing(e.g., top, bottom, left, right). In another example, attachmentfeatures 14 a and 14 b can provide engagement at the back of electronicdevice 12. In yet another example, attachment features 14 a and 14 b canprovide engagement at the front (e.g., where, if present, a display islocated) of electronic device 12. In some cases, a combination ofattachment features can be located at different regions of electronicdevice 12 as for example at the sides and front. In one embodiment,attachment system 14 including attachment features 14 a and 14 b do notdisturb the surfaces of electronic device 12. Similarly, attachmentsystem 13 and in particular attachment features 13 a and 13 b do notdisturb the surfaces of article 10.

In accordance with one embodiment, the attachment features can includemagnetic elements. The magnetic elements can be configured to help inpositioning article 10 relative to electronic device 12 into a matingarrangement. The magnetic elements can further help to secure article 10and electronic device 12 into a mating engagement. It should be notedthat the engagement of article 10 and electronic device 12 can bereversed by the application of an appropriate releasing force thatallows article 10 and electronic device 12 to separate back intoindividual objects. However, the magnetic elements can permit thearticle 10 and electronic device 12 to subsequently resume the matingengagement without the requirement of fasteners of any sort, mechanicalor otherwise. In this way, the magnetic elements provide a repeatableand consistent engagement between article 10 and electronic device 12.

Article 10 and electronic device 12 can further include components 16and 18 respectively. Components 16 and 18 typically depend on theconfiguration of article 10 and electronic device 12 and can, forexample, be mechanical or structural components used to provide supportor they can be operational/functional components that can provide aspecific set of operations/functions. The components can be dedicated totheir respective devices or they may be configured for coupling withaspects of the corresponding article or device (e.g., wired orwireless). Examples of structural components can include frames, walls,fasteners, stiffeners, movement mechanisms (hinge), etc. Examples ofoperational components can include processors, memory, batteries,antennas, circuitry, sensors, display, inputs, and so on. Depending ontheir desired configuration, the components can be external (i.e.,exposed at the surface) and/or internal (e.g., embedded within housing).

FIGS. 2A and 2B are simplified perspective views of article 20 that canbe releasably attached to electronic device 22 via a magnetic attachmentsystem, in accordance with one described embodiment. Article 20 andelectronic device 22 can generally correspond to those discussed withregards to FIG. 1. In one embodiment, the magnetic attachment system canbe embodied as magnetic surface 24 (shown by broken lines or shading)and more particularly as magnetic surface 24 at the sides of electronicdevice 22. Magnetic surface 24 can provide a magnetic field that cancooperate with a corresponding attachment feature in article 20 whenplaced in proximity to one another. The magnetic field can establish anet magnetic attractive force that can pull article 20 and electronicdevice 22 together into the mating engagement along engagement surface26 as shown in FIG. 2B.

In other words, the magnetic field provided by magnetic surface 24 canhave properties such that the net magnetic attractive force betweenarticle 20 and electronic device 22 is substantially perpendicular toengagement surface 26. Moreover, the magnetic field can result in thenet magnetic attractive force between article 20 and electronic device22 being applied uniformly along engagement surface 26. In order torelease article 20 and electronic device 22, a releasing force can beapplied to the two conjoined objects in order to overcome a net magneticattractive force provided by the magnetic attachment system.

It also should be appreciated that although only one side wall is shown,in some cases different sidewalls and possibly a combination ofsidewalls may be used depending on the needs of the attachmentinterface. It should be noted that the use of magnetic attachmentprecludes the need for mechanical attachments such as fasteners.Moreover, the lack of mechanical attachments and the uniformity of theoverall magnetic attractive force can leave the surfaces of article 20and electronic device 22 undisturbed helping to create an appearance ofoneness by in which article 20 and electronic device 22 can appear as asingle, unified entity. The uniformity in appearance can improve theoverall aesthetic appeal of both article 20 and electronic device 22.

In one embodiment, a magnetic surface can be created by embeddingmagnetically attractable elements in the form of the magnetic attachmentfeature within the sidewalls of electronic device 22 and/or article 20.That is, the magnetically attractable elements can be disposed withinarticle 20 and electronic device 22 as for example within the housing ofelectronic device 22. In this configuration, the housing can be formedof non-magnetic material such as plastic or non-ferrous metal such asaluminum. In this way, magnetic force lines can be configured to workthrough the walls of the housing. The magnetic attachment features donot disturb the physical appearance of the external surfaces of article20 and electronic device 22. The magnetically attractable elements inarticle 20 and electronic device 22 can be arranged to produce magneticfields that can cooperate with each other to generate a magneticattractive force that attaches article 20 and electronic device 22together in the mating engagement. The magnetic attractive force beingconfigured to generate a magnetic attraction force normal to engagementsurface 26 between electronic device 22 and article 20.

The magnetic attractive force between corresponding magnetic elements inarticle 20 and electronic device 22 can also be uniformly applied alongengagement surface 26. The uniformity of the overall magnetic attractiveforce along engagement surface 26 can be a result of the uniformity ofthe separation distance between corresponding magnetic elements inarticle 20 and electronic device 22. The uniformity can also be a resultof the consistency of magnetic flux density between correspondingmagnetic elements in article 20 and electronic device 22. The uniformityof net magnetic attachment can be facilitated by the surfaces of article20 and electronic device 22 each forming a well matched fit to eachother. For example, one surface can be flat or have a concave geometrywhereas the other surface can have a matching conforming convexgeometry. In this way, by fitting tightly together, a separationdistance between each of the corresponding magnetic elements in article20 and electronic device 22 can be reduced to a minimum. The conformityof surface shapes can also enhance the overall look and feel of article20 and electronic device 22 by reducing or eliminating the appearance ofa seam at engagement surface 26. This seamless quality can provide anillusion of a single entity when article 20 and electronic device 22 areattached to each other.

In addition to enhancing the overall look and feel, the consistency ofthe separation distance between the magnetic elements can render theattachment force between article 20 and electronic device 22 uniformalong engagement surface 26. In this way, the engagement force can beuniformly distributed across engagement surface 26 preventing buckling,weak spots, and so on that might otherwise affect the overall integrityof the engagement between article 20 and electronic device 22.

FIGS. 3A and 3B are simplified perspective views of article 20 that cantake the form of electronic device 30 that can be directly andreleasably attached to electronic device 32 via a magnetic attachmentsystem in accordance with one described embodiment. In one embodiment,the magnetic attachment system can be embodied as magnetic surface 34(shown by broken lines or shading) and more particularly as magneticsurface 34 at the sides of electronic device 32. Magnetic surface 34 canprovide a magnetic field that can cooperate with a correspondingattachment feature in electronic device 30 when placed in proximity toone another. The magnetic field can establish a net magnetic attractiveforce that can pull electronic device 30 and electronic device 32together into the mating engagement along engagement surface 36 to formcooperating system 38 as shown in FIG. 3B.

FIGS. 4A and 4B are simplified perspective views of article 40 that canbe releasably attached to electronic device 42 via magnetic attachmentunit 44 and corresponding magnetic system 46. It should be noted thatthis particular embodiment is similar to the embodiment described inFIGS. 2A, 2B except that magnetic attachment unit 44 is used tomagnetically attach article 40 and electronic device 42 that werepreviously attached to each other directly at their respective sidewalls. In this way, attachment system 46 can include a plurality ofmagnetic attachment features arranged to provide suitable magneticattachment for article 40 and electronic device 42, respectively.

FIG. 4B shows article 40 and electronic device 42 magnetically attachedto each to each other by way of magnetic attachment unit 44 atengagement surfaces 47 a and 47 b to form cooperating system 48. As partof system 48, electronic device 42 and article 40 can cooperate witheach other to provide features not available by article 40 or electronicdevice 42 separately. For example, article 40 can take the form of ahanging apparatus, docking apparatus, mounting apparatus and so forththat can provide features to a user not available by electronic device42 separately. In one embodiment, article 40 can take the form of adocking system that can be magnetically attached to electronic device 42by way of magnetic attachment unit 44. In one embodiment, the dockingsystem can provide mechanical support for electronic device 42. In oneembodiment, the docking system can act as to provide information toelectronic device 42. In one embodiment, the information can be storedwithin a storage device embedded in magnetic attachment unit 44. In oneembodiment, the information can be received at article 40 (by a WiFiconnection, for example) and passed by way of magnetic attachment unit44 to electronic device 42, and vice versa.

In one embodiment, article 40 can be used to hang electronic device 42.For example, article 40 can include hooks, fasteners, and so forth thatcan be used to grasp another object for support. Article 40 can be usedto provide support for electronic device 42. For example, article 40 cantake the form of an articulating support that can be magneticallyattached to electronic device 42. The articulating nature of article 40can be used to present electronic device 42 at various angles andorientations. It should be noted that due to the releasable nature ofthe magnetic attachment between magnetic attachment unit 44 and article40 can be easily detached when electronic device 42 is to be used andsubsequently re-attached when desired.

FIGS. 5A and 5B are simplified perspective views of article 40 in theform of electronic device 50 that can be releasably attached to anelectronic device 52 via magnetic attachment unit 54. This embodiment issimilar to that shown in FIGS. 4A and 4B in that magnetic attachmentunit 54 can include multiple magnetically attractable elements. Forexample, magnetic elements can be placed within magnetic attachment unit54 in such a way to create magnetic surfaces 56 a and 56 b suitable foractivating magnetic attachment systems in electronic devices 50 and 52,respectively. For example, the activation of the magnetic attachmentsystem in electronic device 52 can result in magnetic surface 58 beingpresented at the side wall of electronic device 52. Magnetic surface 58can be used to magnetically attach magnetic attachment unit 54 andelectronic device 52 at engagement surface 60 a. In one embodiment,magnetic surface 56 b can be created at an opposing side wall ofmagnetic attachment unit 54. In much the same way as with electronic 54,magnetic surface 56 b can be used to activate a magnetic attachmentsystem in electronic device 50 that creates a magnetic surface suitablefor magnetically attaching magnetic attachment unit 54 to electronicdevice 50 at engagement surface 60 b creating cooperating system 62shown in FIG. 5B.

It should be noted, however, that although side to side magneticattachment between electronic devices 50 and 52 are shown, in someembodiments, magnetic surfaces can be located on bottom surfaces and/ortop surfaces of electronic devices 50 and 52. For example, magneticelements of magnetic attachment unit 54 can be embedded behind topsurface 64 of magnetic attachment unit 54 creating magnetic surface 66for attaching to rear surfaces of of electronic devices 50 or 52 forminga back to back arrangement. It should be noted that although not shown,additional magnetic elements can be embedded in a bottom surface ofmagnetic attachment unit 54.

FIG. 5B shows electronic device 50 and electronic device 52 magneticallyattached to each to each other to form cooperating system 62. In thisarrangement, electronic device 52 and electronic device 50 can cooperatewith each other to provide features not available by electronic device50 or electronic device 52 separately. For example, electronic device 50can receive information in the form of, for example, an input commandfrom a user and/or input data from, for example, a sensor. Electronicdevice 50 can process the information in whole or in part and pass theprocessed information to electronic device 52 for further processing Inthis way, cooperating system 62 can process the information in a moreefficient manner preserving computational resources that provides anenhanced user experience over that expected from either electronicdevice 50 or 52 acting separately.

Cooperating system 62 can be formed by placing magnetic attachment unit54 and electronic devices 50 and 52 in proximity to each other such thatmagnetic surfaces 56 a and 56 b on the sides of magnetic attachment unit54 activate magnetic attachment systems in electronic devices 52 and 50,respectively. The activated magnetic systems, in turn, provide magneticsurfaces (such as magnetic surface 58) that interact with magneticattachment unit 54 to create a net magnetic attractive force ofsufficient magnitude and direction to maintain electronic device 50 andelectronic device 52 in a mating engagement to form cooperating system62.

In one embodiment, magnetic attachment unit 54 can be formed of rigidmaterial. In one embodiment, magnetic attachment unit 54 can bebendable. In one aspect, the bendable nature of magnetic attachment unit54 can be used to provide a user with a user interface such as akeyboard and a display that can be presented as a visually comfortableangle such as 75°.

Although the purpose of the magnetic elements is similar, i.e., attacharticle to electronic device, attach electronic device to electronicdevice, it should be appreciated that these mechanisms can widely vary.In some cases, the magnetic fields may be configured differently. By wayof example, the side mounted magnetic surface may provide a firstmagnetic force and the front facing magnetic surface may provide asecond magnetic force that is different than the first magnetic force.This may be in part due to different holding requirements as well asdifferent surface areas, i.e., available space, and its effect oninternal components of the electronic device. In one example, the sidemounted magnetic surface provides a greater holding force for securingthe article (or electronic device) to the electronic device (i.e., it isthe primary securing force) while the front facing magnetic surface isthe secondary securing force.

In one example, magnetic attachment unit 54 includes multiple sectionsthat are semi-rigid and bend relative to one another so as to makemagnetic attachment unit movable and flexible. In one embodiment,magnetic attachment unit 54 can be folded into one or more differentconfigurations, and in some cases can be held in these configurationsusing a magnetic system similar to what is described above. These andother embodiments will be described in greater detail below. Moreover,it should be appreciated that the described embodiments are not limitedto that specifically described herein and other configurations can beused including for example as an accessory device used as a hangingapparatus, as a support mechanism for the electronic device to improveviewing the display and as a support mechanism for or inputting touchevents at a touch sensitive portion of the display, and so on.

The electronic device and article can take many forms. For the remainderof this discussion, the electronic device is described in terms of ahandheld portable computing device. Accordingly, FIG. 6 shows a topperspective view of electronic device 100 in accordance with thedescribed embodiments. Electronic device 100 can process data and moreparticularly media data such as audio, visual, images, etc. By way ofexample, electronic device 100 can generally correspond to a device thatcan perform as a smart phone, a music player, a game player, a visualplayer, a personal digital assistant (PDA), a tablet computer and thelike. Electronic device 100 can also be hand held. With regards to beinghandheld, electronic device 100 can be held in one hand while beingoperated by the other hand (i.e., no reference surface such as a desktopis needed). Hence, electronic device 100 can be held in one hand whileoperational input commands can be provided by the other hand. Theoperational input commands can include operating a volume switch, a holdswitch, or by providing inputs to a touch sensitive surface such as atouch sensitive display device or a touch pad.

Electronic device 100 can include housing 102. In some embodiments,housing 102 can take the form of a single piece housing formed of anynumber of materials such as plastic or non-magnetic metal which can beforged, molded, or otherwise formed into a desired shape. In those caseswhere electronic device 100 has a metal housing and incorporates radiofrequency (RF) based functionality, a portion of housing 102 can includeradio transparent materials such as ceramic, or plastic. Housing 102 canbe configured to enclose a number of internal components. For example,housing 102 can enclose and support various structural and electricalcomponents (including integrated circuit chips) to provide computingoperations for electronic device 100. The integrated circuits can takethe form of chips, chip sets, or modules any of which can be surfacemounted to a printed circuit board, or PCB, or other support structure.For example, a main logic board (MLB) can have integrated circuitsmounted thereon that can include at least a microprocessor,semi-conductor memory (such as FLASH), and various support circuits andso on. Housing 102 can include opening 104 for placing internalcomponents and as necessary can be sized to accommodate display assemblyfor presenting visual content, the display assembly being covered andprotected by protective layer 106. In some cases, the display assemblycan be touch sensitive allowing tactile inputs that can be used toprovide control signals to electronic device 100. In some cases, thedisplay assembly may be a large prominent display area that covers amajority of the real estate on the front of the electronic device.

Electronic device 100 can include a magnetic attachment system that canbe used to magnetically attach electronic device 100 to at least oneother suitably configured object.

The magnetic attachment system can include a number of magneticattachment features distributed within and in some cases connected tohousing 102. For example, the magnetic attachment system can includefirst magnetic attachment feature located in proximity to side wall 102a and a second magnetic attachment feature located beneath cover glass106. In one embodiment, the first magnetic attachment feature canoperate in multiple states. For example, in an inactive state, the firstmagnetic attachment feature can provide first magnetic surface M1 at anexterior surface of side wall 102 a. First magnetic surface M1 can berepresent a magnetic field that has little or no effect on magneticallysensitive devices placed at the exterior surface of side wall 102 a andis also not suitable for magnetic attachment. In other words, magneticsurface M1 is consistent with magnetic flux density B at side wall 102that satisfies Eq. (1):

B≦B_(threshold)   Eq. (1)

where B_(threshold) represents a value of magnetic flux density Bcorresponding to a value of magnetic flux leakage at side wall 102 athat does not facilitate magnetic attachment at side wall 102 a and doesnot substantially affect a magnetically sensitive device at side wall102 a.

In an active state, however, the first magnetic attachment feature canprovide second magnetic surface M2 at the exterior surface of side wall102 as shown in FIG. 6B in cross hatch. Magnetic surface M2 isconsistent with facilitating magnetic attachment at the exterior surfaceof side wall 102 that satisfies Eq. (2):

B>B_(threshold)   Eq. (2).

In one embodiment, an external magnetic field having appropriatemagnetic properties can cause the first magnetic attachment system totransition from the inactive state to the active state. In this way, themagnetic surface expressed at side wall 102 a can change from magneticsurface M1 (shown in FIG. 6A) to magnetic surface M2 (shown in FIG. 6B).The external magnetic field can be provided by a magnetic attachmentfeature external to electronic device 100 that cooperates with the firstmagnetic attachment feature causing the operating state of the firstmagnetic attachment feature to change from inactive to active.

The second magnetic attachment feature can aid in the magneticattachment of another device to electronic device 100 by providingmagnetic surface M3 that satisfies Eq. (2). In one embodiment, thesecond magnetic attachment feature operates has one operating stateconsistent with providing magnetic surface M3.

Although not expressly shown, it is understood that the various magneticattachment features of the magnetic attachment system can be located atany appropriate location of housing 102. For example, magneticattachment features can be located at an interior bottom surface ofhousing 102 or along sides 102 c and 102 d of housing 102.

As shown in FIGS. 7A-7B and referring back to the discussion above withregards to FIGS. 5A-5B, magnetic attachment unit 54 can be used tomagnetically attach electronic devices 100 and 120 to form cooperatingsystem 130 at engagement surfaces 132 a and 132 b. Cooperating system130 can utilize resources from both electronic devices 100 and 120singly or in combination. In one embodiment, electronic device 100 canpresent a virtual keyboard that can respond to a touch event bywirelessly sending corresponding information to electronic device 120.Electronic device 120 can use the information to provide a response. Forexample, a user can select from a list of icons presented by electronicdevice 100 a particular media item, or items. An identification of theselected media item(s) can be forwarded (either wirelessly or by way ofa wired connection) to electronic device 120. In one embodiment,electronic device 120 can decode and present at least a portion of theselected media item.

FIGS. 8A-8C show various embodiments of magnetic attachment unit 200that can be used to magnetically attach electronic device 100 to anobject having a suitably configured magnetic attachment system. Theobject can take the form of an accessory device. The object can take theform of an electronic device. In some cases, the accessory device caninclude electronic components that can communicate with electronicdevice 100, and vice versa. In any case, magnetic attachment unit 200 ascan include magnetic attachment features 202 and 204 connected togetherby way of flexible member 206. In one embodiment, magnetic attachmentfeatures 202 and 204 can be fixedly attached to flexible member 206. Inone embodiment, magnetic attachment features 202 and 204 can bepivotally connected to flexible member 206 thereby providing additionaldegrees of freedom for magnetic attachment unit 200.

FIG. 8A shows a cross sectional side view magnetic attachment features202 and 204 in accordance with the described embodiments. In thisparticular illustration, magnetic attachment features 202 and 204 aremagnetically attached to a portion of housing 102 having a substantiallyflat surface. It should be noted, however, that housing 102 can have acurved shape in which case, the shape of various components of magneticattachment features 202 and 204 described below can take on a shape thatconforms to the shape of housing 102. In this way, a separation distancebetween corresponding magnetic elements within housing 102 and magneticattachment features 202 and 204 can be minimized thereby maximizing anet magnetic attractive force.

It should be noted that in the following description, magneticattachment features 202 and 204 have substantially the sameconfiguration. However, in some embodiments, magnetic attachmentfeatures 202 and 204 can differ somewhat in structure depending upon thenature and form of the objects being magnetically attached together.Therefore, for succinctness, magnetic attachment feature 202 will bedescribed only.

Magnetic elements in electronic device 100 can magnetically interactwith corresponding magnetic element 204. In one embodiment, magneticelement 208 can have thickness of about 2 mm and have a shape thatsubstantially conforms to that of housing 102. The magnetic interactionbetween magnetic element 208 and those magnetic elements in electronicdevice 100 can create net magnetic attractive force consistent with aseparation distance x_(sep) is about equal to the total of the thicknesst of housing 102 and thickness “l” of label 210. Thickness “l” can be onthe order of about 0.2 mm. Label 210 can be used to protect the exteriorsurface of housing 102 against possible scratching and other cosmeticdamage potentially caused by metal to metal contact between magneticelement 208 and housing 102. Both label 210 and magnetic element 208 caneach be shaped to conform to the shape of housing 102. In this way, thedistance between magnetic element 208 and the magnetic element inelectronic device 100 can be reduced to about the thickness t of housing102 and thickness l of label 210.

Magnetic shunt 212 can be glued to and enclose that portion of magneticelement 208 facing away from housing 102. Magnetic shunt 212 can beformed of magnetically active material such as steel or iron. Themagnetically active material can redirect magnetic flux lines that wouldotherwise be directed away from magnetic elements in electronic device100 towards housing 102 thereby increasing the total magnetic fluxdensity B between magnetic attachment feature 202 and electronic device100. Magnetic shunt 212 can, in turn, be glued to housing 214 ofmagnetic attachment feature 202. It should be noted, that in order toassure that only label 210 contacts housing 214 (to avoid metal to metalcontact), label 210 is proud (i.e., protrudes) of housing 102 by aboutdistance “d”. Nominally, distance d can be on the order of about 0.1 mm.

FIG. 8B shows an embodiment of magnetic attachment feature 200 wheremagnetic attachment features 202 and 204 are coupled to rigid member216. As noted above, magnetic attachment features 202 and 204 can befixedly connected to rigid member 216. In one embodiment, magneticattachment features 202 and 204 can be pivotally connected to rigidmember 216.

FIG. 8C shows another embodiment of magnetic attachment unit in the formof magnetic attachment unit 220 where magnetic attachment features 202and 204 are incorporated within connecting member 222 (that can beeither rigid or flexible). In this configuration, there is no need forhousing 214. Therefore, only magnetic element 208, label 210, and shunt212 are required.

The remainder of this discussion will describe particular embodiments ofdevices that can use the magnetic attachment system. In particular,electronic device 100 will henceforth be described in terms of a tabletcomputing device such as the iPad™ manufactured by Apple Inc. ofCupertino, Calif.

In one embodiment, accessory device 120 can be used to enhance theoverall functionality of electronic device 100. For example, accessorydevice 120 can be configured to act as a hanging apparatus. Whenmagnetically attached to electronic device 100, accessory device 120 canbe used to hang electronic device 100. In this way, electronic device100 can be used as a display for presenting visual content such as art,movies, photos and so forth on a wall or suspended from a ceiling. As ahanging apparatus, accessory device 120 can be used to hang electronicdevice 100 from a wall or a ceiling. Electronic device 100 can be easilyremoved by simply exerting a releasing force sufficient to overcome thenet magnetic attractive force F_(NET). Accessory device 120 can be leftin place and be used to reattach electronic device 100 (or anotherdevice) at a later time.

In one embodiment, accessory device 120 can also take the form of aholding mechanism for attaching objects that are not by themselvesequipped to magnetically attach to electronic device 100. For example,accessory device 120 can be configured to carry a stylus or other suchinput device. The stylus can be used to provide inputs to the electronicdevice. In some cases, accessory device 120 can provide a signal toelectronic device 100 indicating the presence of the stylus. The signalcan cause electronic device 100 to enter into a stylus recognitionstate, for example. More particularly, when accessory device 120 ismagnetically attached to electronic device 100, electronic device 100can activate a stylus input state in order to recognize stylus typeinputs. When accessory device 120 is removed, electronic device 100 cande-activate the stylus input state. In this way, the stylus can beconveniently attached/detached to electronic device 100 when needed.

Accessory device 120 can take the form of a support that can be used toenhance the functionality of electronic device 100. For example,accessory device 120 can be configured to act as a display stand onwhich a display of electronic device 100 can be viewed at a comfortableviewing angle such as 75°. In other words, when placed upon a horizontalsurface such as a table or desk, accessory device 120 can supportelectronic device 100 in such a way that the visual content presented atthe display can be viewed at about a viewing angle of approximately 75°.

Accessory device 120 can also take the form of a support that can beused to enhance the functionality of electronic device 100 in a keyboardstate. In the keyboard state, accessory device 120 can be used topresent a touch pad surface at an angle that is ergonomically friendly.In this way, input touch events can be applied (to a virtual keyboard,for example) at an angle that does not overtax a user's wrist, hands,arms, etc.

FIG. 9 illustrates an arrangement 300 formed by magnetically attachingtablet device 302 and tablet device 304 by way of flexible magneticattachment unit 306 in an open configuration. Magnetic attachment unit306 can include flexible connecting member 308 arranged to connectpivoting hinge assemblies 310 and 312 to each other, each of which arein turn magnetically connected to tablet device 304 and 302,respectively. The hinge assemblies can provide one or more pivots toallow magnetic attachment unit 306 to fold over while magneticattachment unit 306 is magnetically attached to devices 302 and 304.

In one embodiment, hinge assembly 310 can include first hinge portion(also referred to as first end lug) 314 and a second hinge portion (orsecond end lug) 316 disposed opposite the first end lug. First end lug314 can be rigidly connected to second end lug 316 by way of connectingrod (not shown) incorporated into connecting member 308 providing anadditional pivoting axis. The connecting rod can be formed of metal orplastic strong enough to rigidly support tablet devices 302 and 304.

Hinge span 318 can include magnetic elements. The magnetic elements canbe arranged to magnetically attach hinge span 318 to a magneticattachment feature having a matching arrangement of magnetic elements intablet devices 302 and 304. More specifically, the magnetic elementswithin hinge span 318 can activate a magnetic feature in tablet devices302 and 304 rendering them capable of magnetically attaching to hingespan 318. Hinge span 318 can be formed of magnetically inactive materialsuch as plastic or non-magnetic metal such as aluminum.

Arrangement 300 can be referred to as a book in that each tablet device302 and 304 can present visual information in a book like manner. Forexample, as shown in FIG. 9, in the open configuration, arrangement 300can resemble an open book in which display 320 of tablet device 302 canfunction like a page in an open book (as can display 322 of tablet 304).In one embodiment, a user can “flip” pages by simply swiping a touchsensitive surface of tablet device 302 (or that of tablet device 304) toflip forward using, for example, a left to right page flipping gesture.On the other hand, in order to flip a page (or pages) backwards, theuser can swipe a touch sensitive surface on either tablet device 302 or304 using, for example, a right to left page flipping gesture.

In any case, in the book mode shown in FIG. 9, tablet devices 302 and304 must communicate with each other in order to provide a reasonableapproximation of a book and a manner in which a book presentsinformation. This communication can take the form of a wirelesscommunication between tablet devices 302 and 304.

FIG. 10 shows arrangement 300 in a closed configuration in which tabletdevice 302 and 304 use the flexible nature of flexible connecting member306 to fold atop one another. In one embodiment, magnetic elementsbeneath displays 320 and 322 can be arranged in such a way that preventstablet devices 302 and 304 from touching each other. In oneconfiguration, the magnetic elements can be arranged to interact in sucha way as to create a net magnetic repulsion force between tablet device302 and tablet device 304 preventing contact between them. In oneembodiment, the magnetic elements can be arranged to create a netmagnetic attractive force that can lock tablet device 302 and 304together. In one embodiment, the magnetic elements can be arranged toprovide little or no magnetic force in the closed configuration.

FIGS. 11A and 11B shows tablet devices 302 and 304 magnetically attachedto each other by way of magnetic attachment unit 330. In one embodiment,magnetic attachment unit 330 can includes connecting member 332 formedof rigid portion 334 and 336 pivotally connected to each other by way ofhinge (or clutch barrel) 338. As shown in FIG. 11A, tablet device 302can be placed upon a flat supporting surface such as a table. Tabletdevice 304 can then be positioned in a vertical orientation relative totablet device 302. In this way, tablet device 304 can act as a displayfor presenting visual content.

FIG. 12A shows tablet device 302 and 304 connected together by way ofmagnetic attachment unit 340. As shown, magnetic attachment unit 340does not include hinge assemblies 318 and is thus fixedly attached totablet devices 302 and 304. Magnetic attachment unit 340 can includerigid connecting members 342 pivotally connected to each other by way ofclutch barrel, or hinge, 338. In this way, as shown in FIG. 12B, tabletdevice 302 can be placed upon a flat supporting surface such as a tableand another electronic device (such as tablet 304) can be positioned toact as a display. As can be seen in FIGS. 12B and 12C, tablet device 304can be replaced by electronic device 100 that is not necessarily atablet device. For example, electronic device 100 can take the form of asimple display capable of being magnetically attached to magneticattachment unit 340. In one embodiment, magnetic attachment unit 340 canactually be formed as part of electronic device 100. In this way,magnetic attachment unit 340 can include only a single magneticattachment feature suitable for magnetically attaching to tablet device302.

As shown in FIG. 12C, support structure 350 can be used to provideadditional support for the upraised electronic device, regardless ofwhether the upraised electronic device takes the form of electronicdevice 100 or tablet device 304.

FIG. 13 shows magnetic attachment unit 220 magnetically attaching tabletdevices 302 and 304 to form tablet array 360. Accordingly, tablet device302 and 304 can communicate with each other by way of a wirelessconnection. In one embodiment, the wireless connection can take the formof a WiFi wireless communication where tablet devices 302 and 304communicate with each other directly. In one embodiment, tablet devices302 and 304 can communicate with each other in part by way of anexternal circuit, such as a wireless router, server computer, and so on.In one embodiment, magnetic attachment unit 220 can providecommunication resources to assist in the communication between tabletdevices 302 and 304. In one embodiment, magnetic attachment unit 220 caninclude processing as well as data storage resources that can be used toalter the operating state of either or both tablet devices 302 and 304.For example, when magnetic attachment unit 220 includes a data storagedevice (such as a FLASH memory), data in the storage device can betransferred to either or both tablet device 302 and 304. The transferreddata can take the form of instructions that can be executed to alter theoperating state of the respective tablet device.

FIG. 14A shows a cross section of system 400 in accordance with anembodiment. System 400 can include tablet device 402 magneticallyattached to cover assembly 404 by way of magnetic hinge assembly 406.Cover assembly 404 can include segmented cover 408 pivotally attached tohinge assembly 404 at pivot 410. Hinge assembly 406 can be magneticallyattached to tablet device 402 by way of magnetic element 412 in hingeassembly 404 and magnetic attachment feature 414 in tablet device 402.Intervening layer 416 can act to prevent direct metal to metal contactbetween hinge assembly 406 and housing 418 of tablet device 402.

Cover assembly 404 can also include separate flap portion 420 pivotallyattached to hinge assembly 406 at pivot 422. In this way, segmentedcover 408 and flap portion 420 can be rotated about their respectivepivots separately as shown in FIG. 14B where segmented cover 408 hasbeen folded into support structure 424. Support structure 424 can betriangular in shape and be used to position tablet device 402 such thatdisplay 426 is presented at about an angle of 75°.

Flap portion 420 can be formed of flexible material such as fabric. Inone embodiment, flap portion 420 can include various input devices. Forexample, as shown in FIG. 15, flap portion 420 can include keyboard 430.Keyboard 430 can be in communication with tablet device 402 using, forexample, a wired connection. In one embodiment, keyboard 430 can be inwireless communication with tablet device 402. Accordingly, a user canpass information to tablet device 402 by pressing various input keys offabric keyboard 430.

It should be noted that flap portion 420 can be configured to includeany suitable type of input device. For example, in one embodiment shownin FIG. 16, flap portion 420 can take the form of input pad 440. Inputpad 440 can be sensitive to touch events such as those provided by astylus, pen, pencil, or even a human appendage such as a finger. Stillfurther as shown in FIG. 17, flap portion 420 can include touch pad 450that can be used to provide information to tablet device 402 by a usertouching touch pad 450 in a prescribed manner.

FIGS. 18A-18D show magnetic docking station 500 in accordance with thedescribed embodiments. Magnetic docking station 500 can include support502 and base portion 504. Base portion 504 can include magnetic elements506 arranged to activate magnetic attachment feature in electronicdevice 100. Therefore, placing of electronic device 100 into slot 508 ofbase portion 504 can result in magnetic elements 506 activating themagnetic attachment feature in electronic device 100. The activation cancause a net attractive magnetic force between magnetic elements 506 andelectronic device 100 strong enough to secure electronic device 100 todocking station 500. In one embodiment shown in FIG. 17B, electronicdevice 100 can take the form of tablet device 302. In one embodiment,docking station 500 can provide electrical power to electronic device100. In one embodiment, docking station 500 and electronic device 100can communicate with each other wirelessly by way of a suitable wirelesscommunication protocol such as WiFi, BlueTooth, and so forth. In oneembodiment, docking station 500 can include docking port(s) that providea wired communication channel between electronic device 100 and anotherelectronic device connected to docking station 500 or in some cases aninput device such as a keyboard, keypad, touch pad, etc. In theembodiment shown in FIGS. 18A-18D, docking station 500 is fixed in thatelectronic device 100 is presented at a substantially fixed angle andorientation with respect to a supporting surface, such as a table ordesk on which an input device such as a keyboard can be located.

However, as shown in FIG. 19A, docking station 600 can be pivot aboutpivot point 602. In this way, electronic device 100 can be presented inany number of angles with respect to the supporting surface. Pivotingdocking station 600 can include base portion 604 pivotally connected byway of pivot 602 to support 606. In one embodiment, magnetic elements610 can activate magnetic attachment feature 612 in electronic device100 to magnetically couple electronic device 100 to pivoting dockingstation 600. In one embodiment, magnetic elements 610 can be included inbase portion 604. FIG. 19B shows an embodiment where electronic device100 takes the form of tablet device 302. FIG. 19C shows articulatingdocking station 650 in accordance with an embodiment of the invention.

FIGS. 20A-20D show various hanging accessories 700 that can bemagnetically attached to tablet device 302 in accordance with thedescribed embodiments. It should be noted that as shown, the hangingaccessories each are formed to include magnetic elements arranged toactivate the magnetic attachment feature included in tablet device 302.This integrated arrangement can reduce the number of componentsrequired. In one embodiment, however, the hanging accessories can bemagnetically attached to tablet device 302 using the magnetic attachmentunit described above. In any case, the various hanging accessories canbe used to hang or otherwise suspend tablet device 302 from any suitablesurface. For example, FIGS. 20A and 20B show variations of hangingaccessory 700 well suited for suspending tablet device 302 from avertical wall. For example, hook accessory 702 and suction cup accessory704 can be used to hang tablet device 302 from a vertical wall such asin an office cubicle in the case of hook accessory 702 and arefrigerator door, chalkboard, or whiteboard in the case of suction cupaccessory 704 shown in FIG. 20B.

FIGS. 20C and 20D show embodiments of hanging accessory 700 that canallow a user to carry tablet device 302 about. For example, fixed handleaccessory 706 can facilitate a user holding tablet device 302 firmly inone hand whereas strap accessory 708 can allow the user to carry tabletdevice 302 about in a more free flowing manner.

FIGS. 20E and 20F show an embodiment of hanging accessory 700 that canbe used to hang electronic device 100 from a vertical surface unsuitablefor hooks or other grasping accessories. Such surfaces includewhiteboards, black boards, smooth metal surfaces, wood surfaces, and soforth. Accordingly, hanging accessory 710 can include support 712 towhich is attached suction cups 714 (or equivalent) that can be used toremovably adhere hanging accessory 710 to the above said surfaces.Hanging accessory 710 also includes base portion 716 that includesmagnetic elements 718 used to activate the magnetic attachment feature720 in electronic device 100. FIG. 20E shows an embodiment wherebyelectronic device 100 takes the form of tablet device 302 attached towhiteboard 722.

FIGS. 21A-21B show additional embodiments of hanging accessory 700 thatcan extend the usefulness and the range of applications for which tabletdevice 302 can be used. For example, FIG. 21A shows tablet device 302mounted to a headrest of an automobile, for example, using clasp 712that conforms to the shape of the headrest. In some embodiment, clasp712 can be somewhat flexible in order to accommodate a variety of shapesand sizes of headrests. In another example, FIG. 21B shows clasp 714that can be used to hang tablet device 302 from an airplane seat, forexample, It should be noted that in both cases, tablet device 302 and bemagnetically attached to both clasp 712 and 714 by way of magneticelements embedded in base portions 716 and 718, respectively. In oneembodiment, base portions 716 and 718 can be pivotally connected toclasps 712 and 714 in order to provide the viewer with an adjustableviewing angle.

In addition to hanging, or otherwise mounting, as shown in FIG. 22A,tablet device 302, mounting accessory 720 can be used to mount tabletdevice directly to an automobile dashboard, for example. In oneembodiment, mounting accessory 720 can be secured to the dashboard 724and can include magnetic elements that can be used to activate themagnetic attachment feature included in tablet device 302. In additionto mechanically securing tablet device 302 to the dashboard, mountingaccessory 720 can be used to port power to tablet device 302, provide aconnection to other electronic devices within the vehicle, and so on.For example, when tablet device 302 can wirelessly transmit audio and insome cases video data to an appropriate receiver circuit. In this way,media data can be ported from tablet device 302. In one embodiment,tablet device 302 can be used in conjunction with other electronicservices available to the vehicle. For example, GPS based navigation canbe displayed on tablet device 302, traffic warnings can be posted,vehicle information (gas level, charge level, etc.) can be posted and soon. In one embodiment, user input can be provided to tablet device 302.The user input can be used to alter an operating characteristic of thevehicle, media, and so forth. FIG. 22B shows mounting accessory 720 canbe used to mount tablet device 302 to exercise equipment such as treadmill 722.

FIGS. 23A-23H show embodiments of tablet device 302 magneticallyattached to various peripheral devices 800. For example, FIG. 23A showscamera 802 magnetically attached to tablet device 302. Camera 802 canoperate in conjunction with or separately from image capture resourcesincluded in tablet device 302. FIG. 23B shows stylus holder 804 withstylus 806. In one embodiment, the operation of tablet device 302 canchange to a stylus recognition mode when stylus holder 804 (or thepresence of stylus 806). In the stylus recognition mode, the operationof tablet device 302 can be such that movements of stylus 806 upondisplay 808 can be recognized and acted upon by tablet device 302.

FIG. 23C shows card swipe 810 magnetically attached to tablet device302. In this arrangement, a user can swipe a magnetically coded card,for example, and the information being readily made available forprocessing by tablet device 302. FIG. 23D shows RF antenna assembly 812that can be used to supplement RF reception and transmission of tabletdevice 302.

FIG. 23E shows memory module 814 magnetically attached to tablet device302 arranged to provide additional memory resources to tablet device302. FIG. 23F shows keyboard 816 magnetically attached to tablet device302. Keyboard 816 can communicate with tablet device 302 wirelessly orby a wired connection.

FIG. 23G shows game controller 818 magnetically connected to tabletdevice 302. In one embodiment, game controller 818 can provideinformation to tablet device 302. The information can include the gameto be played, historical game information, player information andidentification and so forth. FIG. 23H shows audio output module 820having speakers 822 for broadcasting audio content provided by tabletdevice 302.

FIG. 24 shows travel case 900 that can be used to store and transporttablet device 902. Travel case 900 can include magnetic elements 904arranged to activate magnetic attachment feature 906 in tablet device902. In one embodiment, travel case 900 can have a clam shell typearrangement whereby cover 908 can, in a closed configuration, enclosetablet device 902 within a cavity formed by cover 908 and base 910. Inone embodiment, tablet device 902 can be manually released by graspingand removing tablet device 902. In one embodiment, travel case 900 caninclude a releasing mechanism that can overcome the magnetic attractionbetween magnetic elements 904 and the magnetic attachment feature 906 intablet device 902. In one embodiment, the releasing mechanism can bemechanical in nature. In one embodiment, the releasing mechanism can beelectromechanical in nature in which an electromagnetic element intravel case 900 can be energized to overcome the magnetic attractionbetween magnetic elements 904 and magnetic attachment feature 906.

FIGS. 25A and 25B show representative magnetic attraction betweenmagnetic elements 920 in object 922 and magnetic attachment feature 924in an electronic device that can take the form of tablet device 926. Asshown in FIG. 25A, magnetic elements 920 can include at least oneelectromagnetic element that can be used to provide electromotive force.The electromotive force can be used to overcome net magnetic attractiveforce F_(net) between magnetic elements 920 and magnetic attachmentfeature 922. The electromotive force can cause object 922 to separatefrom the electronic device without the use of hands or other mechanicalmechanism. The electromagnetic element can be remotely activated or canbe activated using the electronic device. For example, when theelectronic device takes the form of tablet device 930, home button 932can be pressed thereby causing the activation of the electromagneticelement resulting in the magnetic attraction between magnetic attachmentfeature 922 and magnetic elements 920 being overcome allowing tabletdevice 930 to be removed from travel case 900.

FIGS. 26A-26C graphically illustrate a mechanism whereby a magneticallysensitive circuit, such as a Hall Effect sensor can be used to alter anoperating state of an electronic device. In particular, FIG. 26A showstablet device 1000 in an OFF operating state. Tablet device 1000 caninclude a magnetically sensitive circuit, such as Hall Effect sensor1002. In one embodiment, tablet device 1000 can also include lightsensitive device 1004. In one embodiment, light sensitive device 1004can take the form of an ambient light sensor (ALS). In one embodiment,light sensitive device 1004 can take the form of an image capture devicesuch as a camera. It should be noted that light sensitive device 1004can also take the form of any combination of devices incorporated which,for example, a sensor board that can includes both an ambient lightsensor and a camera that can operate independent or in cooperation witheach other.

In one embodiment, an operating state of tablet device 1000 can bealtered by an external magnetic field H. In one embodiment, externalmagnetic field H can transient in nature by which it is meant thatexternal magnetic field H can vary in time and/or magnetic fieldstrength. In one situation, external magnetic field H can be generatedby a magnetic element, such as magnetic ring 1006, that generates asubstantially non-transient magnetic field that is nonetheless transientas perceived by magnetically sensitive device 1002. For example, bymoving magnetic ring 1006 from left to right as shown in FIGS. 26A-26C,Hall Effect sensor 1002 can detect the external magnetic field H asbeing transient in nature in that the strength of external magneticfield H starts at an initial value and increases in value as magneticring 1006 approaches Hall Effect sensor 1002 and then decreases again asmagnetic ring 1006 moves away from Hall Effect sensor 1002. Thedetection of the transient external magnetic field H provided by themovement of magnetic ring 1006 can result in Hall Effect sensor 1006providing a signal to tablet device 1000. The signal can be interpretedby tablet device 1000 to change from a current operating state (such asOFF) to another operating state (such as ON) as shown in FIG. 26C. Inone embodiment, the change in state of tablet device 1000 can be binaryin nature in that by passing ring 1006 by Hall Effect sensor 1002 asecond time, the signal provided by Hall Effect sensor 1002 can beinterpreted by tablet device 1000 to change the current operating statefrom ON to OFF. In one embodiment, additional sensors (such as ALS,ambient light sensor or camera 1004) can be used in conjunction (orsingly) to provide additional inputs that can be used to alter theoperating state of tablet device 1000 in additional ways.

FIGS. 27A and 27B shows a representative embodiment of hands-freedetaching of magnetically coupled objects. In particular, FIG. 27A showsmagnetically attached configuration 1100 where first magnetic attachmentfeature 1102 is magnetically attached to second magnetic attachmentfeature 1104. In one embodiment first magnetic attachment feature 1102can include element 1106 that is responsive to an externally appliedvoltage (or current), provided by, for example, voltage (or current)source 1108 to generate a magnetic field having polarity P1 so long asthe externally applied voltage (or current) is available.

In one embodiment, when no voltage or current is applied, element 1106provides substantially little or no magnetic flux and is therefore notcapable of supporting a magnetic attachment based solely upon anyintrinsic magnetic field. In one embodiment second magnetic attachmentfeature 1104 can include magnetic element 1110 aligned with and inproximity to magnetic element 1106 when first magnetic attachmentfeature 1102 is placed in proximity to second magnetic attachmentfeature 1104. In one embodiment, magnetic element 1110 can have anintrinsic polarity P1 that is the same as the polarity of element 1106when the external current I or voltage V is applied as shown in FIG.27B. In this way, a net repulsive magnetic force in the form of ejectionforce F_(eject) can be generated between element 1106 and magneticelement 1110 during the duration of the availability of voltage V orcurrent I. In this way, by properly adjusting the size, distance,magnetic properties, and electromagnetic properties, first magneticattachment feature 1102 and second magnetic attachment feature 1104 canbe detached from each other. For example, in t magnetically attachedstate 1100, applying voltage V or current I to magnetic element 1106 cancreate ejection force Feject that forces first magnetic attachmentfeature 1102 and second magnetic attachment feature 1104 to separate inseparated state of 1112 automatically or at least without the need formanually detachment.

FIGS. 28A and 28B shows first magnetic attachment feature 1200 havingmagnetic window 1202 capable of selectively controlling magnetic fluxleakage B at exterior surface 1204 of housing 1206. In one embodiment,magnetic window 1202 can be formed of channel 1208 arranged toaccommodate magnetic fluid 1210. In one embodiment, magnetic fluid 1210can take the form of a ferrofluid that is a liquid which becomesstrongly magnetized in the presence of a magnetic field. Ferrofluids arecolloidal in nature formed of a liquid having nanoscale ferromagnetic,or ferrimagnetic, particles suspended in a carrier fluid—usually anorganic solvent or water. Each tiny particle is thoroughly coated with asurfactant to inhibit clumping. Large ferromagnetic particles can beripped out of the homogeneous colloidal mixture, forming a separateclump of magnetic dust when exposed to strong magnetic fields. Themagnetic attraction of nanoparticles is weak enough that thesurfactant's van de Waals repulsion is sufficient to prevent magneticclumping. Ferrofluids usually do not retain magnetization in the absenceof an externally applied field.

Therefore, in the inactive state (i.e., Eq. (1) is satisfied), magneticattachment feature 1200 can include magnetic elements 1212 embedded inor in close proximity to housing 1206 where magnetic fluid 1210interacts with magnetic field generated by magnetic elements 1212. Themagnetic nature of magnetic fluid 1210 prevents any flux leakage atexterior surface 1204 of housing 1206 thus providing a boundarycondition required to satisfy Eq. (1). In this way, there is norequirement for moving magnetic elements 1212 in order to providemagnetic surface M1 at exterior surface 1204. In one embodiment,magnetic window 1202 can also include reservoirs 1214 (either one or aplurality) that provide sufficient volume to accommodate magnetic fluid1210 as shown in FIG. 28B.

In one embodiment, second magnetic attachment feature 1216 can include amechanism that can cause magnetic fluid 1210 to migrate out of channel1208 into one or both reservoirs 1214 to expose magnetic elements 1212.By exposing magnetic elements 1212, magnetic surface M2 can be providedsatisfying Eq. (2). In one embodiment, the mechanism used to migratemagnetic fluid 1210 can take the form of magnets 1218 having strongenough magnetic field strength to overcome the attraction of magneticelements 1212. In this way, the placement of second magnetic attachmentfeature 1216 in proximity to first magnetic attachment feature 1200 cancause magnetic window 1202 to go from a closed state (consistent withEq. (1)) to an open state (consistent with Eq. (2)).

FIGS. 29A and 29B shows first magnetic attachment feature 1300 having aretaining mechanism in the form of retaining magnets 1302. By providingmagnets 1302, valuable space can be preserved. Since the strength andsize of magnets 1302 can be well defined, the size and strength ofactivating magnets 1304 in second magnetic attachment feature 1306 canalso be well defined. For example, in order to activate first magneticattachment feature (i.e., satisfying Eq. (2)), magnets 1308 must movefrom inactive position X1 (magnetically attached to magnets 1302) toactive position X2. This can be accomplished by placing activatingmagnets 1304 in proximity to magnets 1308. In one embodiment, theintrinsic magnetic strength of magnets 1304 and 1308 can be adjusted toovercome the magnetic attraction between magnets 1302 and magnets 1308causing magnets 1308 to detach from magnets 1302 and move towardsmagnets 1304 creating magnetic surface M2 in the process (i.e.,satisfying Eq. (2)).

FIGS. 30A and 30B shows an embodiment of first magnetic attachmentfeature 1300 having channels 1310 sized to accommodate moving magnets1308 and retaining magnets 1302. In one embodiment, moving magnets 1308can travel within channel 1310 smoothly and with little resistance dueto the presence of a lubricant (not shown) between moving magnets 1308and interior surfaces of channels 1310.

FIGS. 31A-31C show another embodiment of first magnetic attachmentfeature 1300 shown in FIGS. 30A-30B arranged to provide informationbased upon an attachment configuration. In one embodiment, all or atleast some of magnets 1302 are electrically isolated from chassis groundformed by the metal of housing 1206. In one embodiment, all or at leastsome of magnets 1302 can be coupled to a sensing circuit arranged tosense if magnet 1308 is attached to magnet 1302. In those cases wherethe sensing circuit senses that magnet 1308 is attached to magnet 1302,then a first logic value (“0” or “1”, whichever is deemed appropriate)can be provided. Conversely, when the sensing circuit senses that magnet1308 is not attached to magnet 1302, then a second logic value (“1” or“0) different from the first logic value can be provided. In oneembodiment, information in the form of the first and second logic valuescan be used to identify a magnetic attachment state. In one embodiment,the attachment state can identify an object magnetically attached (seeTable 1 shown in FIG. 32). In one embodiment, the attachment informationcorresponding to the attachment state can be used to alter an operatingstate of an electronic device, such as tablet device 1000. For example,using the information provided by Table 1, if the sense circuit sensesdata {1,0,0,0,0,1} corresponding to a stylus, then tablet device 1000can alter a current operating state to one consistent with sensing astylus upon a touch screen or display.

FIGS. 32A and 32B show specific embodiments of first attachment feature1300 shown in FIGS. 31A-31C. In one embodiment, retaining magnet 1302can be electrically isolated from housing 102 and include electricalcontact 1320 electrically connected by way of line 1322 to the sensecircuit. As can be seen, when retaining magnet 1302 is not attached tomoving magnet 1308, there is no electrical path between the sensingcircuit and chassis ground, and therefore substantially no current flowscorresponding to the second logic state. On the other hand, as shown inFIG. 32B, when moving magnet 1308 is in contact with retaining magnet1302 and more particularly electrical contact 1320, current path 1326 isprovided allowing current I to flow to/from chassis ground. FIG. 33shows a table of representative operating magnetic codes and operatingstates.

FIG. 34 is a block diagram of an arrangement 1600 of functional modulesutilized by an electronic device. The electronic device can, forexample, be tablet device 1500. The arrangement 1600 includes anelectronic device 1602 that is able to output media for a user of theportable media device but also store and retrieve data with respect todata storage 1604. The arrangement 1600 also includes a graphical userinterface (GUI) manager 1606. The GUI manager 1606 operates to controlinformation being provided to and displayed on a display device. Thearrangement 1600 also includes a communication module 1608 thatfacilitates communication between the portable media device and anaccessory device. Still further, the arrangement 1600 includes anaccessory manager 1610 that operates to authenticate and acquire datafrom an accessory device that can be coupled to the portable mediadevice.

FIG. 35 is a block diagram of an electronic device 1650 suitable for usewith the described embodiments. The electronic device 1650 illustratescircuitry of a representative computing device. The electronic device1650 includes a processor 1652 that pertains to a microprocessor orcontroller for controlling the overall operation of the electronicdevice 1650. The electronic device 1650 stores media data pertaining tomedia items in a file system 1654 and a cache 1656. The file system 1654is, typically, a storage disk or a plurality of disks. The file system1654 typically provides high capacity storage capability for theelectronic device 1650. However, since the access time to the filesystem 1654 is relatively slow, the electronic device 1650 can alsoinclude a cache 1656. The cache 1656 is, for example, Random-AccessMemory (RAM) provided by semiconductor memory. The relative access timeto the cache 1656 is substantially shorter than for the file system1654. However, the cache 1656 does not have the large storage capacityof the file system 1654. Further, the file system 1654, when active,consumes more power than does the cache 1656. The power consumption isoften a concern when the electronic device 1650 is a portable mediadevice that is powered by a battery 1674. The electronic device 1650 canalso include a RAM 1670 and a Read-Only Memory (ROM) 1672. The ROM 1672can store programs, utilities or processes to be executed in anon-volatile manner. The RAM 1670 provides volatile data storage, suchas for the cache 1656.

The electronic device 1650 also includes a user input device 1658 thatallows a user of the electronic device 1650 to interact with theelectronic device 1650. For example, the user input device 1658 can takea variety of forms, such as a button, keypad, dial, touch screen, audioinput interface, visual/image capture input interface, input in the formof sensor data, etc. Still further, the electronic device 1650 includesa display 1660 (screen display) that can be controlled by the processor1652 to display information to the user. A data bus 1666 can facilitatedata transfer between at least the file system 1654, the cache 1656, theprocessor 1652, and the CODEC 1663.

In one embodiment, the electronic device 1650 serves to store aplurality of media items (e.g., songs, podcasts, etc.) in the filesystem 1654. When a user desires to have the electronic device play aparticular media item, a list of available media items is displayed onthe display 1660. Then, using the user input device 1658, a user canselect one of the available media items. The processor 1652, uponreceiving a selection of a particular media item, supplies the mediadata (e.g., audio file) for the particular media item to a coder/decoder(CODEC) 1663. The CODEC 1663 then produces analog output signals for aspeaker 1664. The speaker 1664 can be a speaker internal to theelectronic device 1650 or external to the electronic device 1650. Forexample, headphones or earphones that connect to the electronic device1650 would be considered an external speaker.

The electronic device 1650 also includes a network/bus interface 1661that couples to a data link 1662. The data link 1662 allows theelectronic device 1650 to couple to a host computer or to accessorydevices. The data link 1662 can be provided over a wired connection or awireless connection. In the case of a wireless connection, thenetwork/bus interface 1661 can include a wireless transceiver. The mediaitems (media assets) can pertain to one or more different types of mediacontent. In one embodiment, the media items are audio tracks (e.g.,songs, audio books, and podcasts). In another embodiment, the mediaitems are images (e.g., photos). However, in other embodiments, themedia items can be any combination of audio, graphical or visualcontent. Sensor 1676 can take the form of circuitry for detecting anynumber of stimuli. For example, sensor 1676 can include a Hall Effectsensor responsive to external magnetic field, an audio sensor, a lightsensor such as a photometer, and so on.

The various aspects, embodiments, implementations or features of thedescribed embodiments can be used separately or in any combination.Various aspects of the described embodiments can be implemented bysoftware, hardware or a combination of hardware and software. Thedescribed embodiments can also be embodied as computer readable code ona non-transitory computer readable medium. The computer readable mediumis defined as any data storage device that can store data which canthereafter be read by a computer system. Examples of the computerreadable medium include read-only memory, random-access memory, CD-ROMs,DVDs, magnetic tape, and optical data storage devices. The computerreadable medium can also be distributed over network-coupled computersystems so that the computer readable code is stored and executed in adistributed fashion.

The foregoing description, for purposes of explanation, used specificnomenclature to provide a thorough understanding of the describedembodiments. However, it will be apparent to one skilled in the art thatthe specific details are not required in order to practice the describedembodiments. Thus, the foregoing descriptions of the specificembodiments described herein are presented for purposes of illustrationand description. They are not target to be exhaustive or to limit theembodiments to the precise forms disclosed. It will be apparent to oneof ordinary skill in the art that many modifications and variations arepossible in view of the above teachings.

The advantages of the embodiments described are numerous. Differentaspects, embodiments or implementations can yield one or more of thefollowing advantages. Many features and advantages of the presentembodiments are apparent from the written description and, thus, it isintended by the appended claims to cover all such features andadvantages of the invention. Further, since numerous modifications andchanges will readily occur to those skilled in the art, the embodimentsshould not be limited to the exact construction and operation asillustrated and described. Hence, all suitable modifications andequivalents can be resorted to as falling within the scope of theinvention.

1. A magnetic attachment unit for magnetically attaching together atleast individual first electronic and second electronic devices eachhaving an associated magnetic attachment feature, comprising: a bodycomprising: a first side, a second side opposite the first side,electronic circuitry arranged to at least provide a communicationchannel between the first and second electronic devices and processingresources, and a data storage unit arranged to store data; a firstmagnetic attachment system at a first side of the body comprising atleast a first magnet arranged to provide a first activation force foractivating the corresponding magnetic attachment feature in the firstelectronic device; and a second magnetic attachment system at a secondside of the body comprising at least a second magnet arranged to providea second activation force for activating the corresponding magneticattachment feature in the second electronic device, wherein a magneticattachment force generated between the activated first and secondmagnetic systems and the corresponding magnets in the magneticattachment unit causes the first and second individual electronicdevices to operate together as a cooperating electronic device.
 2. Themagnetic attachment unit as recited in claim 1, wherein substantiallyall of the body is flexible.
 3. (canceled)
 4. The magnetic attachmentunit as recited in claim 1, wherein the data storage unit storesprogramming code executed by the cooperating electronic device.
 5. Themagnetic attachment unit as recited in claim 1, wherein the data storageunit stores programming code executed by at least a portion of theelectronic circuit for output by the cooperating electronic device. 6.The magnetic attachment unit as recited in claim 1, wherein thecooperating electronic device is an electronic book.
 7. The magneticattachment unit as recited in claim 1, wherein the body furthercomprises: a first portion, the first portion incorporating the firstmagnetic attachment system; a second portion, the second portionincorporating the second magnetic attachment system; and a flexibleportion attached to the first and second portions such that the firstelectronic device and the second electronic device pivot with respect tothe flexible portion independent of each other.
 8. The magneticattachment unit as recited in claim 7, wherein the first portion and thesecond portion are each formed of a rigid material.
 9. The magneticattachment unit as recited in claim 8, wherein the flexible portion is aclutch assembly.
 10. The magnetic attachment unit as recited in claim 9,wherein the clutch assembly is a locking clutch assembly arranged tolock the first and second electronic devices in positions approximately90° apart. 11-43. (canceled)
 44. The magnetic attachment unit as recitedin claim 1, further comprising a communication link arranged to providea communication channel between the first and second electronic devices.45. The magnetic attachment unit as recited in claim 44, wherein thecommunication link comprises a wired connection disposed in the body.46. The magnetic attachment unit as recited in claim 44, wherein thecommunication link is a wireless connection.
 47. The magnetic attachmentunit as recited in claim 1, wherein the first electronic device furthercomprises a display arranged for presentation of visual content.
 48. Themagnetic attachment unit as recited in claim 47 wherein the body forms asupport structure that is used to position the display at about a 75°angle in relation to a horizontal supporting surface.
 49. The magneticattachment unit as recited in claim 1, wherein the first electronicdevice is a tablet computer.
 50. The magnetic attachment unit as recitedin claim 6, wherein the data storage unit stores content at least someof which is visually presented by the display.